English: Synthesis of unbranched saturated fatty acids, redrawn from File:Saturated Fatty Acid Synthesis.png. The grey dashed arrow indicates the cyclical character of this pathway. In each cycle, two C atoms from a malonyl-CoA molecule (top left) are added to a growing ACP-bound acyl chain, starting with an acetyl chain and continuing until a length of 16 C-atoms (palmitic acid).